Car-truck.



H. M. PFLAGER & H. G. VAN BUSKIRK.

GAR TRUCK.

APPLICATION FILED MAR. 27, 1911..

1,007,140, Patented Oct. 31, 1911.

BY WWW UNITED STATES PATENT OFFICE.

HARRY M. PFLAGER, OF ST. LOUIS, MISSOURI, AND HENRY C. VAN BUSKIRK, OF DEN- VER, COLORADO, ASSIG-NORS TO DOUBLE MISSOURI, A CORPORATION OF MISSOURI.

BODY BOLS'IER COMPANY, OF ST. LOUIS,

CAR-TRUCK.

Specificationof Letters Patent.

Patented Oct. 31, 1911.

Application filed March 27, 1911. Serial No. 617,053.

To all whom it may concern:

Be it known that we, HARRY M. PFLAGER and HENRY C. VAN BUsKIRK, citizens of the United States, residing, respectively, at St. Louis, Missouri, and Denver, Colorado, have invented a certain new and useful Improvement in Car-Trucks, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompany- -1ng drawings, in which Figure 1 is a vertical transverse section through the bolster and spring-plank, and corresponding section through the adjacent transoms of the frame line l-1, Fig. 2, of a six-wheeled car truck, showing our improved swing-hanger or stirrup in side elevation applied thereto; Fig. 2 is a vertical longitudinal section through the same on line 2-2, Fig. 1; Fig. 3 is an enlarged view at right angles to Fig. l of one of the upper hinge ends of the swinghanger, and Fig. 4 is a horizontal section thereof on line M, Fig. 3.

This invention relates to a new and useful improvement in car trucks, and particularly t-o'a swing-hanger or stirrup employed for suspending the truck bolster, springplank and supporting-springs in position, the object being to dispense with the separate bearing block or liner ordinarily interposed between the lower supporting member of a swing-hanger and the bottom bearing of the spring-plank.

Another-object is to simplify the construction of the stirrup and to increase its rigidity.

In the drawings, 0: represents an end portion of the bolster, b the corresponding portion of the spring-plank, c the springs intermediate to the bolster a and spring-plank b, d the transoms, one on each side of the bolster a, and c the frame (broken away) of a preferably six-wheeled car truck, all constructed and arrangedin the usual wellknown or any suitable manner, the bolster a, spring-plank b, and transoms d in the present case being composed preferably of cast steel.

f represents our improved swing-hanger which is preferably composed of cast steel integral throughout, and consists of a yoke having its arms 1 formed at their respec- (broken away) on tive ends with preferably a fork or jaw 2, each side of which, in constructing the hanger f, is preferably cast around a tubular bushing 3 composed of rolled steel or other suitable wear-resisting material, and adapted to receive a pin 4 which is passed therethrough and through a suitable boss'5 formed on or fixed to the corresponding transom 03, whereby the swing-hanger f is suspended from the truck frame 6, its bottom bar or member 6 in the assembled position of the parts being adapted to engage the bearing 7 which is interposed between it and the underside of the spring-plank b, and thereby support the latter with the springs c and truck-bolster a without the use of a separate block or liner between the supporting memher 6 of the hanger f and the bearing 7 as ordinarily the case. For this purpose we form the bottom bar or supporting member 6 of the swing-hanger f preferably girder-shaped, such as I-shaped, as shown, having maximum depth in the middle and having an upper compression member m and a bottom tension member united together by a web 2-, the upper member 00 being transversely convex: at the top and adapted to engage in a corresponding concavity in the bearing 7 for allowing free movement of the spring-plank b and its appendages in the plane of their suspension from the truck frame whereby the rigidity ofthe bottom bar or supporting member 6 is increased, the construction of the swing-hanger simplified, and its engagement with the bottom bearing 7 of the spring-plank b rendered mor e direct and positive than when a multipliclty of intermediate pieces are used.

Each arm I of the swing-hanger f is preferably cruciform in cross-section for a suitable distance from its upper perforated? end or fork 2 and thence T-shaped to its junction with the bottom bar or supporting member 6, but may be otherwise shaped as desired for insuring strength and rigidity to the swing-hanger f. Furthermore, by casting the upper end of each arm 1 around a separately constructed tubular bushing 3, the latter, when worn internally, can be quickly removed and renewed without discarding the hanger. It is here noted that the upper end of each arm 1, in lieu of being forked as described, may be straight, and either cast around a separately constructed bushing similar to 3, or perforated thereat without bushing for receiving the pivot pin of the hanger.

We claim:

1. ln a car .truck the combination of a frame and a stirrup or swing-hanger suspended therefrom tor supporting the bolstar, the legs of which are reinforced by vertical ribs and the bottom connecting member of which is formed by connected compression and tension members, the top surface of which compression member is convex in cross section to form a seat for the parts supported thereby.

2. A swing-hanger or' stirrup for car trucks comprising legs formed with eyes in their upper ends, bushings arranged in the openings of said eyes, said legs being reinforced by vertical strengthening ribs, and a connecting member having a rounded upper surface and consisting essentially of members which areplaced in compression and tension in supporting a load.

3. A stirrup or swing hanger for car 1,007, ieo

trucks, comprising a substantially U-shaped member, the upper ends of the legs of which are provided with eyes, bushings arranged in the openings of said eyes, and the connecting member of which stirrup is formed by connected compression and tension members.

t. A stirrup or swing hanger for car trucks, comprising a substantially U-shaped member, the upper ends of the legs of which are bifurcated, which bifurcated upper ends are formed with eyes, bushings arranged in the openings of said eyes, and the connecting member of which stirrup is formed by connected compression and tension members.

In testimony whereof, We have hereunto afiixed our signatures in the presence of two witnesses, this 3rd day of March, 1911.

HARRY M. PFLAGER. HENRY O. VAN BUSKIBK.

Witnesses:

HAL G. BELLVHJIE, C. 'l. Wns'rmn, 

